/*
 * Copyright 2013-2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.cloud.nacos.endpoint;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.alibaba.cloud.nacos.NacosConfigProperties;
import com.alibaba.cloud.nacos.NacosPropertySourceRepository;
import com.alibaba.cloud.nacos.client.NacosPropertySource;
import com.alibaba.cloud.nacos.refresh.NacosRefreshHistory;

import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;

/**
 * Forked from com.alibaba.cloud.nacos.endpoint.NacosConfigEndpoint.java
 *
 * Endpoint for Nacos, contains config data and refresh history.
 *
 * @author xiaojing
 */
@Endpoint(id = "nacosconfig")
public class NacosConfigEndpoint {

  private final NacosConfigProperties properties;

  private final NacosRefreshHistory refreshHistory;

  private ThreadLocal<DateFormat> dateFormat = ThreadLocal
      .withInitial(() -> new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

  public NacosConfigEndpoint(NacosConfigProperties properties,
      NacosRefreshHistory refreshHistory) {
    this.properties = properties;
    this.refreshHistory = refreshHistory;
  }

  @ReadOperation
  public Map<String, Object> invoke() {
    Map<String, Object> result = new HashMap<>(16);
    result.put("NacosConfigProperties", properties);

    List<NacosPropertySource> all = NacosPropertySourceRepository.getAll();

    List<Map<String, Object>> sources = new ArrayList<>();
    for (NacosPropertySource ps : all) {
      Map<String, Object> source = new HashMap<>(16);
      source.put("dataId", ps.getDataId());
      source.put("lastSynced", dateFormat.get().format(ps.getTimestamp()));
      sources.add(source);
    }
    result.put("Sources", sources);
    result.put("RefreshHistory", refreshHistory.getRecords());

    return result;
  }
}
